Dege?ierative Orchitis of Calves 377 



Cryptorchid testicles based upon embryologic arrest are al- 

 most invariably much smaller in volume than in the condi- 

 tion under discussion. It appears highly probable that in 

 all, or virtually all scrotal testicles of the type described the 

 changes are referable to bacterial invasion. The period of 

 invasion appears to be that of the nursery. At least the era 

 of invasion precedes puberty, so that from the first copula- 



Fig. 122— Degenerative (Atrophic) Orchitis in Young- Bull. 



/, Normal testis ; 2, atrophic degenerate testes ; 3, body of atrophic gland ; 



4, head and, 5, tail of epididymis ; 6, scrotal peritoneum turned back, 



showing adhesions to testicular peritoneum. 



tion the animal is absolutely unfertile. The invasion may 

 be intra-uterine, but this appears doubtful. The bacterial 

 invasion of living bovine fetuses is commonly restricted, so 

 far as determined, to the alimentary tract. Perhaps it 

 would be more accurate to term the presence of bacteria in 

 the fetal alimentary canal as bacterial "inclusion" rather 

 than "invasion." That is, the bacteria from the utero- 

 chorionic cavity of the cow invade the amniotic fluid by 



